The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 2015
Filed:
Nov. 07, 2013
Kabushiki Kaisha Toyota Chuo Kenkyusho, Nagakute-shi, Aichi-ken, JP;
Eiichi Ono, Toyota, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Nakagute, JP;
Abstract
According to a relaxation length compensation torque computation sectionof a vehicle steering apparatusa relaxation length compensation torque is computed based on (1) a front wheel actual steering angular velocity computed from a motor rotation angular velocity input by a front wheel actual steering angular velocity computation sectionand based on (2) a transfer function that is (a) expressed using a difference between a road surface reaction torque model and a referential reaction torque model and that is (b) determined according to a vehicle velocity input by a vehicle velocity sensorA power steering controlleradds the relaxation length compensation torque to an assistance torque, and controls an EPS motorso as to generate the assistance torque to which the relaxation length compensation torque has been added. The relaxation length compensation torque is thereby computed with good precision, enabling high handling performance to be achieved.